Lanthanide N,N′-piperazine-bis(methylenephosphonates) (Ln=La, Ce, Nd) that display flexible frameworks, reversible hydration and cation exchange

Mowat, John P. S.; Groves, John A.; Wharmby, Michael T.; Miller, Stuart; Li, Yang; Lightfoot, Philip; Wright, Paul A.

doi:10.1016/j.jssc.2009.07.019

Cited by 26 publications

(27 citation statements)

References 24 publications

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“…is mode has only been found in the compound Nd 2 (H 2 L) 3 ⋅9H 2 O reported by Groves et al [6]. It is similar to those of the reported compounds KCeL 4 ⋅4H 2 O and La 2 L⋅H 2 L⋅4.5H 2 O [7]. Most of the reported cases act as monodentate donors to bridge with metal centers [8][9][10][11].…”

Section: Resultssupporting

confidence: 86%

“…e ligand H 4 L, as a type of multidentate ligand (O-and/or N-donor), can be protonated and/or deprotonated to produce H 3 L − , H 2 L 2− , HL 3− , and L 4− with versatile metal-binding and hydrogen-bonding capabilities. Most of its associated works have focused on the assembly of the transition metals, 10 -block metals, and lanthanides metal-organic open frameworks [5][6][7][8][9][10][11][12][13][14]. e other important task is the choice of metal ion in the formation of CPs.…”

Section: Introductionmentioning

confidence: 99%

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Structures and Spectroscopy Studies of Two M(II)-Phosphonate Coordination Polymers Based on Alkaline Earth Metals (M = Ba, Mg)

Wei²,

Kan

et al. 2013

Journal of Spectroscopy

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e two examples of alkaline-earth M(II)-phosphonate coordination polymers, [Ba 2 (L)(H 2 O) 9 ]⋅3H 2 O (1) and [Mg 1.5 have been hydrothermally synthesized and characterized by elemental analysis, FT-IR, PXRD, TG-DSC, and single-crystal X-ray diffraction. Compound 1 possesses a 2D inorganic-organic alternate arrangement layer structure built from 1D inorganic chains through the piperazine bridge, in which the ligand L −4 shows two types of coordination modes reported rarely at the same time. In 1, both crystallographic distinct Ba(1) and Ba(2) ions adopt 8-coordination two caps and 9-coordination three caps triangular prism geometry structures, respectively. Compound 2 possesses a zero-dimensional mononuclear structure with two crystallographic distinct Mg(II) ions. Free metal cations [MgO 6 ] 2+ and uncoordinated anions (L-H 2 ) 2− are joined together by static electric force. Results of photoluminescent measurement indicate three main emission bands centered at 300 nm, 378.5 nm, and 433 nm for 1 and 302 nm, 378 nm, and 434.5 nm for 2 ( ex = 235 nm), respectively. e high energy emissions could be derived from the intraligand * -transition stations of H 4 L (310 nm and 382 nm, ex = 235 nm), while the low energy emission (>400 nm) of 1-2 may be due to the coordination effect with metal(II) ions.

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Section: Resultssupporting

confidence: 86%

Section: Introductionmentioning

confidence: 99%

Structures and Spectroscopy Studies of Two M(II)-Phosphonate Coordination Polymers Based on Alkaline Earth Metals (M = Ba, Mg)

Wei²,

Kan

et al. 2013

Journal of Spectroscopy

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“…Synthesis of STA-12(Co): STA-12(Co) was synthesized hydrothermally by reaction of cobalt(II) acetate and N,N'-piperazinebis(methylenephosphonic acid) (H 4 L), prepared by the method reported by Mowat et al [60] In a typical synthesis cobalt(II) acetate tetrahydrate (Sigma), H 4 L, potassium hydroxide solution (freshly prepared, 1 mol L À1 ), and water (20 mL) were mixed, to give a reaction ratio of 2.0:1.0:2.12:900, in a Teflon lined autoclave (40 mL). The reaction was stirred for 30 min and an initial pH of 8 was recorded.…”

Section: Methodsmentioning

confidence: 99%

Aerobic Epoxidation of Olefins Catalyzed by the Cobalt‐Based Metal–Organic Framework STA‐12(Co)

Beier

Kleist

Wharmby

et al. 2011

Chemistry A European J

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117

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“…)) and its dehydrated form demonstrated by synchrotron X-ray crystallography. 76 As shown in Fig. 17, the hydrated FL-MOF consists of Ce-phosphate chains composed of edge sharing CeO 8 polyhedra.…”

Section: Dynamic Fl-mofs Induced By Flexible Ligandsmentioning

confidence: 99%

Metal–organic frameworks based on flexible ligands (FL-MOFs): structures and applications

et al. 2014

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Metal-organic frameworks (MOFs), also known as coordination polymers (CPs), are crystalline materials constructed from metal ions or clusters bridged by organic ligands to form one-, two-, or three-dimensional infinite networks. In contrast with the prolific production of MOFs based on rigid ligands (RL-MOFs), the design, syntheses and applications of MOFs based on flexible ligands (FL-MOFs) are somewhat overlooked. Although sacrificing a measure of control, the use of flexible ligands may provide unique opportunities to obtain novel crystalline framework materials exhibiting desirable attributes. In this review, emphasis has been placed on the design and the structural diversity of FL-MOFs. Homochiral FL-MOFs and dynamic frameworks induced by flexible ligands are also briefly outlined. An overview is also shown for the applications of FL-MOFs as platforms for gas adsorption, heterogeneous catalysis, proton conduction etc.

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Lanthanide N,N′-piperazine-bis(methylenephosphonates) (Ln=La, Ce, Nd) that display flexible frameworks, reversible hydration and cation exchange

Cited by 26 publications

References 24 publications

Structures and Spectroscopy Studies of Two M(II)-Phosphonate Coordination Polymers Based on Alkaline Earth Metals (M = Ba, Mg)

Structures and Spectroscopy Studies of Two M(II)-Phosphonate Coordination Polymers Based on Alkaline Earth Metals (M = Ba, Mg)

Aerobic Epoxidation of Olefins Catalyzed by the Cobalt‐Based Metal–Organic Framework STA‐12(Co)

Metal–organic frameworks based on flexible ligands (FL-MOFs): structures and applications

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